Saw-setting machine.



I Zia/022732: 6% 7 Q2121; CO 0 HE NORRIS PETERS 60., F'HOTO-LITHQ, WASHINGYON. D. c

Patented Jan. 5, 1915.

1]. TI 1 l t JOHN 0. PETTEY, OF- BELVIDERE, ILLINOIS.

SAW-SETTING MACHINE.

masses.

Specification of Letters Iatent.

Patented Jan. 5, 19115.

Application filed December 26, 1913. Serial No. 808,798.

To all whom it may concern:

Be it known that I, Joi-IN O. PETTEY, a

citizen of the United States, residing at Belvidere, in the county of Boone and the State of Illinois, have invented certain new and useful Improvements in Saw-Setting Machines, of which the following is a speci fication.

This invention relates to machines for set ting the teeth of saws of various kinds.

The object of my invention is to provide an improved means for operating and controlling the action of the hammer or tool which is operable upon the teeth of a saw for setting same; and further, to construct said means to be operable in an intermittent stroke action, whereby upon an operating stroke being made in one direction the said hammer will first be caused to, strike the saw tooth and then be moved to an inoperative position by the latter part of the movement of said operating stroke.

In the accompanying drawings: Figure 1 is a front elevational view of my improved saw setting machine, shown in an inoperative position. Fig. 2 is a side elevational view of Fig. 1. Fig. 3 is a vertical sectional view through the machine as taken on the line 33 of Fig. 1. Fig. 4: is a plan sectional view as taken on the line 1-4: of Fig. 3.

The body of the machine is adapted to be mounted upon a fixed support and is formed with a base 5 which serves as an anvil and has a saw receiving face 6, a. comparatively narrow back 7 which carries at its upper end a hollow column 8 whose axis is vertical and in alinement above the said anvil saw face, and an extended bearing 9 intermedi ate the anvil and said column and having its axis in alinement with that of the column.

A hammer 10 is mounted with its opposite end portions slidable lengthwise in the bearing 9 and column 8, the lower end of the hammer having a tooth-set 11 and the upper portion having a tappet 12, the end of which is guided in a vertically extending slot 12. A spiral spring 13 is located within the column, resting upon the top end of the hammer, and adjustable screw 14 received in the top of the column opening holds said spring tensionally depressed upon the hammer. mounted in the back 7 and extends from said back to close proximity of the hammer 10. A toothed wheel 16 is mounted upon the A horizontal shaft 15 is shaft 15 adjacent the hammer and each tooth is shaped with a peripheral face 17 upon. which the tappet is adapted to rest, a dog engaging face 18 and an inclined face 19, the indents between the teeth being of such depth as to allow the tappet to be movable thereinto the depth of the hammer stroke. A lever 20 is pivoted intermediate its ends to the shaft 15, carries at one end a pivoted dog 21 which is engageable with faces 18 of the wheel 16, and has a stop 22 at its dog end which is contactable with the body to limit downward movement of the said end at a point with the dog just having engaged with a tooth face 18. A spring 23 is coiled about the bearing of shaft 15 and has an end 24 in engagement with the dog, holding the same yieldingly in engagement with the toothed wheel and at the same time exerting a yielding downward pressure wise to present new teeth tothe set, as is well understood in the art. With the niovable parts in an inoperative position as shownin Fig. 1, that is, with the hammer held elevated by its tappet 12 being set upon tooth face 17 and the lever held with its dog engaging a tooth face 18, the end 25 of the lever will be moved downwardly to set a tooth. At the commencing of such lever op- 5 eration the wheel 16 will be moved rotatably by the dog and the tappet 12 released allowing the hammer to be forced down by the spring 13 in a setting stroke which is limited by said tappet striking the bottom of the tooth indent, and upon continuing said downward movement of the lever the rotation of the wheel 16 will cause the tappet to be raised by the inclined face 19 of the following tooth, to a position resting upon the face 17 of this tooth, whereupon the end of the dog will strike the tappet and limit further movement of the lever in this direction (this position shown dotted in Fig. 1). The end 25 of the lever is then released by the operator and it will move to its raised position by the action of spring 24:, leaving the hammer set in an elevated position ready for a succeeding stroke.

tool according to the tooth profile, and op-.

erating means for rotating said wheel intermittently, each such rotarymovement being a 1 positively predetermined distancefor causir' ig'a feed stroke of said tool and for retracting. and positioning the tool set for a subsequent action of said operating means.

are a device of the character set forth, the combination with a reciprocable tool and a toothed-wheel, of a member in connection with the tool and being associated with the profile face'iof said wheelfor operating said tool. according to the tooth profile, and operating meansfor rotating said wheel, said means'having an operating movement positively limited to; the extent of rotating said wheel the equivalent distance of one full tooth said memberbeing, by such rotation, released from a set position to become operatively active andtobe retracted and positioned in said set'position.

In a machineofthe character set forth, a reciprocable tool, a cam, a member guided upon the cam-face and being connected with the tool for; governing movement of same, saidmember being held in a set position to maintain the tool in an elevated position and adapted by movement of the cam to releaselsaid member allowing operative action of said tool and to retractthe tool and position it in said set position, and operable means for moving said cam, having its operating movement positively limited to the extent of moving; the cam to guide the tool member from the set to set-position above described,

4:; Inamachine ofthecharacter set forth, a reciprocabletool, a, cam, a memberguided PQIi h c mr ia efand. ngnonne with a the tool for'governing movement of same, sa idimember being held in a set posltionto maintain the tool in an elevated position,

Cop le t: oi this patentmay'be obtained for adapted by movement of the cam to release said member allowing operative action of said tool and to retract the tool and position it in said set position, means intermittently operable for operative action, said means being connected with said cam, and means for positively limiting the operative action of said means to move the cam a positive predetermined distance which will guide said tool member from the set to set position above described.

5. In a machine of the character set forth, a reciprocable tool, a toothed-wheel, a member connected with the tool and being guided by the profile of the wheel-teeth, an operable member, and a dog carried by said member'and being in contact with the wheel tooth-face for imparting rotary motion to said wheel.

6. In a machine of the character set forth, a reciprocable tool, a toothed wheel, a member connected with the tool and being guided by the profile of the wheel-teeth, an operable member, a dog carried by said member and being in contact with the wheel toothface for imparting rotary motion to said wheel, and stop means for limiting opposite directions of movement of said member.

7. In a machine of the character set forth, a reciprocable tool, a toothed-wheel, a member connected with the tool and being guided by the profile of the wheel-teeth, an operable member, a dog carried by said member and being in contact with the wheel toothfaee for imparting rotary motion to said wheel, stop means for limiting opposite directions of movement of said member, and a common spring means for holding the dog in contact with said wheel and said member against one of the stop means.

In testimony whereof I have hereunto set my'hand in presence of two subscribing witnesses.

JOHN O. PETTEY.

lVitnesses JOHN W. ETHRIDGE, T. B. LUKMAN.

five cents each, by addressing the "Commissioner of Patents,

Washington, D. C. 

